Speed indicator and alarm



(No Model.)

G. A THOMPSON 8: J. FSGHMADEKE.

SPEED INDICATOR AND ALARM.

No. 529,975. Patented Nov. 27, 1894.

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ATTORNEYS.

NI ED STATES PATENT OFFICE.

GEORGE A. THOMPSON AND JOHN F. SOHMADEKE, or BROOKLYN, f NEW YORK.

SPEED INDICATOR AND ALARM.

SPECIFICATION forming part of Letters Patent No. 529,975,datea November 2'7, 1894. Application filed April 27, 1394- Serial No. 509,187- (No model.)

To all whom it may concern.-

Be it known that we, GEORGE A. THOMPSON and JOHN F. SOHMADEKE, both of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Speed Indicator and Alarm, of which the following is a full, clear, and exact description.

Our invention relates to improvementsin speed indicators and alarms; and the object of ourinvention is to produce a device of this kind which is particularly adapted for use on electric cars, as on such cars a supply of elec-' tricity is always available, but which may be used on cars of any kind and is adapted to close an electric circuit when the speed gets above or reaches a certain point and by the closing of the circuit operates either a double or fusible signal. The most convenient arrangement in connection with the circuit closing apparatus is bells orlights, which may be made to ring or shine.

To these ends our invention consists of certain features of construction and combinations of parts, which will be hereinafter described and claimed.

Reference is to be had tothe accompanying drawings, forming a part of this specification, in which similar figures and letters of reference indicate corresponding parts in both the views.

Figure l-is a broken sectional elevation of the apparatus embodying our invention, showing the position of the parts with the circuit broken; and Fig. 2 is a vertical section on the line 2-2 of Fig. 1.

The apparatus is mounted in a suitable frame which may be arranged in any convenient manner. In the top of the frame is a contact rod 11 which is held in an insulating block lO formed on the frame, and is adjustable up and down, being held by a screw 13. It is provided with gage marks 12 to enable it to be accurately adjusted and it connects by a wire a with a bell 1 which is also connected by a wire a with one pole of a bat? tery A, or other source of electric supply, and the battery also connects by a wire or with the second contact rod 15 which is adapted to move into contact with the rod 11 and thus close the circuit. It will be understood that instead of the bell 14. a lamp may be used,

which will be lighted by the closing of the circuit, or any other signaling and electrically operated mechanism may be used.

The lower end of the rod 11 is preferably concave, as shown at 17, to enable the convex upper end 16 of the rod or shaft 15 to fit it nicely, and the lower end of the shaft or rod 15 is convex so as to fit in the concave upper end ofasupporting post 19. The rod 15 slides vertically through a revoluble insulating block 20 which has side lugs 21 turning in a recess 22 in the frame 10, but the block may be supported in any convenient manner. The block has one end formed into a ratchet wheel 20 carryingabelt or chain 20", adapted to connect with the car axle, either directly or by means of suitable gearing. The shaft 15 has also journaled loosely thereon a weight 23 which is held from moving longitudinally on the rod by the collars 24, and the weight 23 and block 20 have pivoted to them outwardly-extending arms 25 which are also pivoted to weight balls 26, the arrangement being substantially like that of the well known ball governor for steam engines. It will be seen that if the speed of the car is at a high point, thespreading of the balls 26 draws up the weight 23 and shaft or rod 15, thus forcing the rod into contact with the rod 11 and closing the circuit so as to ring the bell, light the lamp, or work the signal which is in the circuit, and the speed of the car can then be slackened, after which the weight 23 carries the rod 15 downward so as to again break the circuit. It will be understood that the rod 11 may be adjusted so that the contact will be made and the circuit closed at any desired speed.

Having thus described our invention, we claim as new and desire to secure by Letters Patent- 1. A device of the kind described, comprising a longitudinally adjustable contact rod forming one terminus of an electric circuit which includes an alarm, a longitudinally movable circuit closing rod to touch the contact rod, the circuit closing rod forming the other terminus of the circuit, a revoluble insulated block held in stationary bearings and mounted on the circuit closing rod, driving mechanism to revolve the block, a weight fasrevoluble weight carried by the rod, a revoluble insulated block held in stationary bearings and revolving on the rod, pivoted arms connecting the block and weight, and weight balls carried by the arms, substantially as described.

GEORGE A. THOMPSON. JOHN F. SCHMADEKE.

Witnesses:

I. S. MILLER, RICHARD J. WULFF. 

